Turn nixos-shell vm into an integration test importing a module

flake.lock

@@ -16,6 +16,26 @@
         "type": "github"
       }
     },
+    "nixos-shell": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1683035198,
+        "narHash": "sha256-5hHkokfSY3Z4VqjNm/j564l9Bgynw5H5McX0hTruGoI=",
+        "owner": "Mic92",
+        "repo": "nixos-shell",
+        "rev": "2cb76875e501eccb012625546864dd0085750843",
+        "type": "github"
+      },
+      "original": {
+        "owner": "Mic92",
+        "repo": "nixos-shell",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1669833724,
@@ -35,6 +55,7 @@
     "root": {
       "inputs": {
         "flake-compat": "flake-compat",
+        "nixos-shell": "nixos-shell",
         "nixpkgs": "nixpkgs"
       }
     }

flake.nix

@@ -3,14 +3,20 @@
 
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/22.11";
+    # Included to support default.nix and shell.nix
     flake-compat = {
       url = "github:edolstra/flake-compat";
       flake = false;
     };
+    # Included to support the integration test in tests/demo.nix
+    nixos-shell.url = "github:Mic92/nixos-shell";
+    nixos-shell.inputs.nixpkgs.follows = "nixpkgs";
   };
 
-  outputs = { self, nixpkgs, flake-compat }:
-  let system = "x86_64-linux";
+  outputs = { self, nixpkgs, flake-compat, nixos-shell }:
+  let
+    inherit (nixpkgs.lib) makeOverridable nixosSystem;
+    system = "x86_64-linux";
     pkgs = nixpkgs.legacyPackages.${system};
   in {
     packages.${system} = {
@@ -38,5 +44,16 @@
       path = builtins.path { path = ./template; name = "source"; };
       description = "A basic intake source config";
     };
+
+    nixosModules.intake = import ./module.nix self;
+
+    nixosConfigurations."demo" = makeOverridable nixosSystem {
+      inherit system;
+      modules = [
+        nixos-shell.nixosModules.nixos-shell
+        self.nixosModules.intake
+        ./tests/demo.nix
+      ];
+    };
   };
 }

module.nix

@@ -0,0 +1,13 @@
+flake: { config, lib, pkgs, ... }:
+
+let
+  inherit (lib) mkIf mkOption types;
+
+  cfg = config.services.intake;
+in {
+  options = {
+  };
+
+  config = {
+  };
+}

tests/demo.nix

@@ -1,5 +1,7 @@
-{ pkgs, ... }: {
-  boot.kernelPackages = pkgs.linuxPackages_latest;
+{ pkgs, ... }:
+
+{
+  system.stateVersion = "22.11";
 
   nixos-shell.mounts = {
     mountHome = false;